Lightning striking distance of complex structures
2008 (English)In: IET Generation, Transmission & Distribution, ISSN 1751-8687, Vol. 2, no 1, 131-138 p.Article in journal (Refereed) Published
Traditionally, the location of lightning strike points has been determined byusing the rolling sphere method, but recently the collection volumemethod (CVM) has also been proposed for the placement ofair terminals on complex structures. Both these methods are empiricalin nature and a more advanced model based on physicsof discharges is needed to improve the state of affairs.This model is used to evaluate the striking distance fromcorners and air terminals on actual buildings and the resultsare qualitatively compared with the predictions of the rolling spheremethod and the CVM. The results show that the strikingdistance not only depends upon the prospective return stroke currentand the geometry of the building, but also on thelateral position of the downward leader with respect to thestrike point. A further analysis is performed to qualitatively comparethe lightning attraction zones obtained with the CVM and theleader inception zones obtained for a building with and withoutair terminals. The obtained results suggest that the collection volumeconcept overestimates the protection areas of air terminals placed oncomplex structures, bringing serious doubts on the validity of this method.
Place, publisher, year, edition, pages
2008. Vol. 2, no 1, 131-138 p.
PROTECTION, FIELD, MODELS
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-72495DOI: 10.1049/iet-gtd:20070099ISI: 000252958100015OAI: oai:DiVA.org:kth-72495DiVA: diva2:487697
QC 201202022012-01-312012-01-312012-02-23Bibliographically approved